Begtrlating vaiate



March 24, 1931. R. F, RINGLE REGULATING VALVE Filed July 2, 1929 2 Sheets-Sheet 'VENToR March 24, 1931. R F, RlNGLE 1,797,297

REGULATING VALVE Filed July 2., 1929 2 SheetsSheet 2 Y L. *Kyi N 1v/2%@ Rw H m/ N We?? Patented Mar. 24, 1931 ROBERT F.l miiemi,' or znmiinornn;rnmisYLveiin I REGULATING Vvninim;

Appiication inea July 2,1929. semaine. 375,558.

1o fromthe pattern, with accelerated down- .f

ward movementi, TheV operatingconditions ofthe. invention vare somewhat'similar to those describedfnin patent of Ringle Noi 1,452,848.

'x15 In th drawings showing onel preferred Yeinbodiment of the' invention 1 isaseetional view showingmy imj cess in :cap 313,0@ lof the casing 3, and is retained provedioontrol lvalve connected to v the Cylin-` derusedlforraising and lowering the flask` 2.0 Slippprtingleqilalzins platforms.

F1g.x2 isanenlargedvertical Ysectional Y i thfvalve; Shwinsfhepatan the raisins* position; and; 1 Fig. 3 aview similar to Fig. 2,l showing 2 5 the parts linltl'ie slow lowering position.

Referring lto thel drawings; theeylinde'r A Contains apistonBadaptedptobe raised and v lowered therein by the action of any suitable fluid,v as oil, lControlled by the valve generally 3o designated C'. Piston B supports a flask sup- Porbnsrlatfofm' (ndt Shown) adapted wb@ raised and; lowered thereby inthe processof l werin-gthev flask from, the patternjin a turnover. molding machine.

35 f' The yvalve coiprises. an outercas'ing 2 and. an inner valve ,Casing f3, preferably; l forfrlned `integral with agoover plate 4 for f closing' he Casing 12j @dimming/a [Huid reservoir.5.. y j Y' 1 The yeasing3coi-1 trains the operable parts of the` entire valve," includes a Vreservoir 6, having a portf? l closedby a valve8, a' port 9 c-losedfbya valve and in communication withan upperreservoir.cavity 1 1 having an 45 outlet Per@ 12 adapted Iteleiiermally Bless@ ply, and an independent supply ofair .is in-y i bymeans ofa cheek valvel. A pipe orc'onduit 14 -emineotsv 'tlie`re'se'rvoir` 6 with" the; cylinder A. f

The valve-Sisprovid'ed at its up er end with a piston or plunger-15, conneeted) thereto bya tlireadedfextension 16` andga nutlf'.- `A spring -18 e. surrounds the valve "guide 19f and normally maintainsthe'valve 8in raised positionfj a piston member20, 'anfabutment or stopl 21 adapted to abut against the. annular edge faire of valvefcap 22 mounted onthe. cover iplate 4;

Spring 23 normally closes valve 10 andis provided with an adjustable sc rew' member 6d 2l niounted in theoap` 22 f Th@Y valve llis mounted afsuitabl fgtherein. bya potter. in 25.' lPort/s 26 permit v the passageV of flui y'from the .valve seat, as

will be hereinafter` more fullyA described. l `An actuating liuidfsuoh as compressed air,

l' is -introducedfinto an 'uppercavity. 5a. for

actionon the-liquidin reservoir 5 bygal pipe or conduit 27f`from a suitable source ofV sup-` troducled into theohamber 22a ofthe cap 22 by meansfof a pipe oroonduit 28.

` Thedl'a'tter pipe is designated as the fast drawilinje, and is provided witha three-way 75 valve 29, having an operatinghandleBO and a portV 3l inj'ommunication with'thefatmosV` phere. PipeV or conduit 27. is provided with asimilar valve32, having an operating handleand a p ortf in eomrnunication with theatmospher f 'The'operationof my improvedvalve isy as follows z: To raise' the plunger B, valve 32 is lopened andfairA underffpressure fenters cham-ber 5a throughloonduit, Such pres- 85 sure acting upon `"CheoilQin the reservoir raiseslvalve lSironi itsseat (Figl2) permit ting the oil to flow under pressure `by pipell` to cylinder Af, whereby `thel"plun'ger B is reises- These Presse-"euren reislader; 90.

The valve l()l is;y mounted', having y55 i control the tension of spring 23, thereby determining the time of opening of the valve 10.` Back pressure in chamber 6 unseats valve 10 transmitting said pressure to chamber 11, and closes valve 8 by acting upon the piston "15. l

To lower the piston B, valve handle 33 is rotated to permit exhaust of the pressure in the upper portionV of reservoir 5 to the atmosphere through port 34. lUpon releasing such pressure, the back pressure from cylinder A will unseat the valve 13 permitting the oil from the cylinder A toreturn"to reservoir 5 through the ports 26. Due to the comparative areas of the ports, the above process will effect a slow initial lowering of plunger B and withdrawal of the molding laslrfrom the pattern. Y

When the mold iask has become disengaged from the pattern, it is desiredto lower the ask morev quickly. rIhis may be done by opening valve 29, admitting 'air under pressure to the chamber 22a, when the pressure acts upon the piston 20, closing valve 10. The back pressure from cylinder A thenv acts upon the shoulder 35 ofthe valve 8, raising Vthe valve andrpermittin'g the oil to return to the reservoir 5 freely and quickly.

It will be understood that the air pressure against check valve 13 is always greater than the back pressure from the cylinder, so thatv the' plunger B may always be maintained raisedby holding the air pressure in chamber 5a. When the air is released as described, then the back pressure of the .fluid through port 9 unseats check valve 13, returning oil by a retarded flow to the main reservoir. By c osing port Q'upon admitting pressure by pipe 28 against plunger 20, the pressure acts directly onv the area of shoulder 35, lifting valve 8, for free open flow to the reservoir, resulting in more rapid lowering of the plunger. n

The lowering operation is initiated by releasing air pressure on the check valve 13, for Ythe desired reverse circulation as described.

'From the foregoing description it will be` vaction of plunger B is desired chamber 22a is open to the atmosphere by operation of valve 29 and port 31, opening of port 9 with admission of pressure to cavity 11, closing of valve 8, opening of check valve 13 and retarded circulation through port 26.

What I claim is 1. In a valve for controlling the operation of a plunger in its casing, a valve casing having a main chamber and a secondary inner chamber, a conduit connecting the secondary chamber with the plunger casing, a normally seated check valve between the main chamber and the secondary chamber, a valve controlled port between the secondary chamber and therrcheck valve, and a plunger actuated valve subject to back pressure inthe second ary chamber controlling circulation between he secondary chamber and the main cham- 2. In a valve for controlling the operation of aplunger in its casing, a valve casing having a main chamber and a secondary inner chamber, a conduit connecting the secondary chamber with the plunger casing, a normally seated check valve between the main chamber and the secondary chamber,`a valve controlled port between the secondary chamber and the check valve, a plunger and valve controlling said port, means for sup-t plying pressure to said plunger to close the port, and a plunger actuated valve subject to back pressure in the secondary chamber controlling circulation between the secondary chamber and the main chamber.

3. In a valve for controlling the operation of 4a plunger in its casing, a valve casing having amain Vchamber and a secondary inner chamber, a conduit connecting the secondary chamber .withl the plunger casing, a normally seated vcheck valve between4 the main chamber and the secondary chamber, a Valve controlled port between the secondary chamber and the check valve, a plunger and valve controllingy said port, means for supplying pressure fto said plunger to close the port, a pressure spring and adjusting meansV therefor opposing back movement of l the plunger, and a plunger lactuated valve subject to back pressure in the secondary chamber controlling circulation'between the secondary chamber andthe main chamber.

4..V In a controlling valve as described, a main liquid containing casing having an air pressure connection, an inner casing having Va fluid circulating conduit, a spring retracted plunger having a valve controlling circulation from the inner casing to the mainv casing, a check valve subject to air pressure controlling restricted circulation between'the inner casing and the main casing, and acirculationport in the inner casing between its circulating conduit and the spring retracted plunger havinga controlling valve.

5. In a controlling valve as described, a main liquid containing casing having an air pressure connect-ion, an inner casing having a iiuld Circulating conduit, a spring retracted vplunger having a, valve controlling circule-v tion from the inner casing to the mein easing,

e check Valve subject to eir pressure contro1` f lingrestrioted lcirculation between the inner Cil casing and the main casing, aeirculation port in the inner casing between its Circulating conduit and the spring retracted plunger having a controlling valve, and a pressure controlledy plunger having a valve for said port.

In testimony whereof I hereunto aix my signature.

ROBERT F. RINGLE.

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